Fire-extinguishing apparatus.



H. H. COGKBURN.

FIRE BXTINGUISHING APPARATUS.

APPLICATION FILED DBG.19,1913.

Patented Feb. 16, 1915.

Huma/116mm HENRY HERBERTKCOCKBURN, O F BINSGARTH, MANITOBA, CANADA.

FIRE-EXTIN GUISHIN G APPARATUS.

Speeicatien of Letters Patent.

Patented Feb. 1o, reis..

Application-filed' December 19, 1913. Serial N o. 807,700.

T0 all/whom 'it may' concern:

Be it known that I, HENRYHnRBERT-Coox- BURN, a. subject of the King` of Great Britain, and resident of Binscarth, in the Province of Manitoba, Dominion of Canada,

have invented certain new and useful Im provements in Fire-Extinguishing Apparatus, of which the following is' the specification. l

My invention relates to improvements in fire-extinguishing apparatus, and the objects of thev inventionare tol hermetica-l'ly seal the interior of such lire extinguishing apparatus and to allowA4 the communication of air therewith as found desirable, and it consists essentially of theimproved construction hereinafter more-particularly describedL by the following specification. y

Figure 1 is a sectional view of ",th'e'fimgL provedirev extinguishing apparatus'g 2' is a plan view of the air lcontrolling.means located in the stuffing box. Fig. 3 isadetail of' the auxiliary air controlling means.' F ig. f is a transverse -section ofthe pumpA cyiinder on the line 2 2 of Fig. 1f;-

Like letters of reference refer'l-ike 'parts inthe several drawings. .Y

Referring to the drawings,f-Airisv the receptacle for the lre extinguishing liquid, such receptacle being of anysuitabjle shape, that shown being in the forlnpf'fa pail,fsu'ch pail" being provided with a cover having an aperture 10 located' therein-normally closed by an auxiliary covering b which ishinged by a flangeV 16 to the spindlel'y supported inthe brackets 14 and 15 inthe top of the cover. To prevent deterioration'- of the contents of the receptacle a plurality of grooves 8 and-9 are formed in the cover about the aperture 10 and theV cover b is: provided with downwardly extending flanges 11 and 12 ex- I tending into these grooves. -In closing the cover a piece of tinv foil 17' or similar substance isl preferably stretched across the aperture and grooves and the grooves are also illed with wax or a like sealing substance.

Extending through the top of the pail and secured thereto is a pump cylinder B, the lower end of which is closed by the externally screw threaded plug c provided with a port Z surrounded by a conical valve seat d onwhich'seats a ball E. Operating in the pump cylinder is a piston head Cfsecured to and formed integralwith the. piston rod D which extends upward through the top of the pump cylinder vand is"support,

cylinder. The stuffing box F is; further provided with a flange extending from the upper face thereof andformed 'integral therewith, the outer edge 28l of the said flange being splayed outwardly, thereby forming a suitable seating for a plug 29".` The top of the piston-rod is provided' with a reducing screw threaded portion f on which screws the handle g, the plugI or valvev 29gl being located between the shoulder formed on the sald plston rod and the bottom face of the said handle g. The piston rod D makes an air tight connection with the stuling box F and this is brought aboutby means of the packing or stuffing' gland having a threaded engagement with the said stufing box F.

29 represents threads extending around the' inner periphery of the said upwardly extending llange formed on the stuffing box F, the said threads extending only partially around and being disposed? at a suitable angle thereto. In conjunction with the said thread 29 there is a lower thread 30 which extends slightly beyond 4the upper thread, thereby forming a suitable guiding means, the object of which will be made clear hereafter. The piston rod D is further provided with pins 31 which: are locatedon the outer periphery thereof and attached in any suitable manner to the said rod, that preferably chosen being by means of a screw threaded engagement.

32 represents a pipev or conduit extending from the upper face of the packing or stuifing box Fand projecting into the cylinder B, the lower end of thesa-id pipe passing through the cylinderwalls into. the interior A of the pail.

K represents a pipe or conduit located in the cover and extending therethrough, the outer end of the said conduit being spl'ayed outwardly, thereby forming a convenient Seating for a plug to be located thereon.

, 20 representsl a spindle extending through the conduit K, such spindle being provided with a pin 21 fixed in its outer periphery, said pin being 'designed to engage with threads 22 located in and-extending partially around the inner periphery of the said conduit K. 23 represents a .plug or f valve of conical formation and of any suitable-material rigidly attached t0 the saidspindle 20 and designed to engage with the outer splayed end of the conduit K, thev turned inv one direction, thereby removingv the valve or plug 23 from the outer splayed end of the conduit'K allowing the air to enter the casing A;

The piston C consists essentially of two annular plates z' land y' of slightly less diameter than the inside of the cylinder B and spaced apart to leave'an annular space between and a vertically movable packing ring /r located between the two annular plates. rlhe annular plates z' and j preferably have notches 7 formed in their edges to enable the liquid to more readily flow past the same. `T he piston rod D has one set of ports m aii'ording communication between the interior thereof and the annular space l between the t'wo annular plates i and j, and a second set of ports n affording communication between the interior of the piston rods and the annular space o between the cylinder and piston rods.

rl`he discharge nozzle E is secured to the top of the receptacle A, and is formed with a hollow body portion p, and inlet ports q provided with a valve seat u and ball valve t which, when the fire extinguisher is not in use, is adapted to prevent the inflow of air into the receptacle A. The outlet port is connected to the discharge hose gaand a pin p1/ is provided which normally prevents the ball t from seating against the hose .port and overcomes the liability of its sticking thereto. A conducting spout r extends between the port q and the outside of the cylinder B and ports s are provided in the side of the cylinder B a'ording communication between the interior of the same and the spout r. Y

To enable the extinguisher to be used by more than one person an auxiliary or supplemental extinguisher M islocated within the larger receptacle, preferably being in the form of a syringe.

ln the operation oit the device the receptacle having been filled with any desired fire extinguishing liquid, the handle g is grasped and given one halt turn by means of' which the pins 3l, which were adapted to engage with the-threads 29 and 30, are freed therefrom., so permitting of the rod D being drawn upwardly. By this means the valve or plug 29 is removed from the seating 28 and air is permitted to flow through the pipe 32 into the interior A of the receptacle.

An auxiliary device is also provided, consisting of the conduit K having the conical plug or valve 23 located in the upper splayed edge thereof. This plug is rigidly mounted on the spindle 20 and is operated by means et the handle 2d rigidly attached to the outer Maaate filled. ln the downward movement of the piston rod, the packing ring k moves tothe upper position against the plate i and the liquid in the bottom portion of the cylinder, passes around the plates y' in through the ports or passages m and out through the ports or passages n, into the annular space o, and so in this operation the top portion of the cylinder is partially filled. lnthe next upward movement of the piston and piston rods a portion of the contents of the cylinder above. they piston is forced out through the spout 1' and discharge nozzle E unsealing the ball in doingso. ln the next downward movement of the iston, the packing ring la again assumes its position against the upper plate z, and the contents of the bottom portion of the cylinder rushes through the piston intoythe annular space above, and a portion of the contents of the top part of the cylinder is again forced out through the discharge nozzle. This operation may be repeated as often as desired and thus,` at each stroke of the piston., whether upward or downward, the liquid is forced through the discharge nozzle. 'll`he discharge on up and down strokes may be eoualized bv proportioning the area ol" the piston rod l) to the cylinder B. llt will be clear that since the volume of liquid which occupies the space below the piston., when the said piston is at its extreme upward stroke, is twice the volume which can be contained on the upper side of, the piston. owing to the fact that the piston rod occupies halt the volume ot the said upper space., discharge must necessarily take place during both the upward and downwar stroke ot the piston.

lt is observed that when the device is not in operation the ball t rests on its seat and closes the port g so that no air can enter into the receptacle.

The amount ot discharge on` the down stroke is. of course, proportional to the diameter ot the piston rod,r for it is the insertion of the piston rod into the cylinder lB alreadytilled with liquid, which causes part ot' the liquid therein to be discharged through the hose as above described.

fllt will be observed that by unscrewing the stutiing box F, the piston rod and piston imav be removedq permittingl access to the lltltl ill@ llllhi lil@ ball valve and allowing the packin vring lc to be cleansed or inspected. When t e ex.-

tinguisher is not in use the liquid is filled into the casing A. to a predetermined level. The conduit K is closed by `means of the valve 23, thereby preventing the air from entering into the said casing A. In closing the valve' located in the top of the plunger rod the pin is adaptedto be guided by the bottom thread. 30 thereby facilitating the pin being located between. the thread 29 and the'thread 30.

What I claim as my invention is:

'A lire extinguisher of the 4class described consistingof a `casing adapted to be filled with a chemical fire extinguisher, of a cover .located in the said casing, a cylinder, a stuffing box adapted to make screw engagementwith the outer end thereof, the upner face of thel said stuiling box being provi ed tendin casing, as and -with an upwardly extending flan e, threads located in and extending partia 1y around the inner periphery of such upwardly exflange, a piston rod `operating in the sald cylinder, such piston rod being provided with pins located in its outer-periphery, said pins bein desi ed to en ave with the said threads, g plugglhcated orig t e upper end of such piston rod anddesined to engage with the upperA end of the sai ugwardly extending flange, and a pipe exten ing through the said stuling box, the vlower end of thesaid ipe being located in the lsaid dhr the purpose specified. p In witness whereof I have hereunto set Amy hand .in the presence of two witnesses.

HENRY HERBERT COCKBURN. Witnesses:

BEATRICE BRESSER, F. E. BARBER. 

